ASTM F2331-11(2021)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2331 − 11 (Reapproved 2021)
Standard Test Method for
Determining Chemical Compatibility of Substances in
Contact with Thermoplastic Pipe and Fittings Materials
This standard is issued under the fixed designation F2331; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 4. Significance and Use
1.1 This test method is used for determining chemical 4.1 These procedures can be used to evaluate chemicals or
compatibility of substances in contact with thermoplastic pipe materials expected to come in contact with plastic piping
and fittings materials. relative to causing environmental stress-cracking in thermo-
plastic materials. This testing results in determining time-to-
1.2 This test method is not intended to evaluate the suitabil-
failure versus engineering stress. This procedure can also be
ity of solvent cements or adhesives used to join plastic piping.
used in stress-rupture regression analysis, where a variety of
1.3 The values stated in inch-pound units are to be regarded
stress levels are needed. The methodology can be readily
as standard. The values given in parentheses are mathematical
adapted to conducting immersion tests in liquids or testing
conversions to SI units that are provided for information only
temperatures other than 73 °F (23 °C).
and are not considered standard.
1.4 This standard does not purport to address all of the 5. Interferences
safety concerns, if any, associated with its use. It is the
5.1 In these procedures, there may be interference effects
responsibility of the user of this standard to establish appro-
due to differences in resin or the additives in the thermoplastic
priate safety, health, and environmental practices and deter-
materials. Until such time as data is available to address this,
mine the applicability of regulatory limitations prior to use.
the user should take this into consideration when applying this
1.5 This international standard was developed in accor-
test method.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
6. Apparatus
Development of International Standards, Guides and Recom-
6.1 Apparatus for constant tensile method.
mendations issued by the World Trade Organization Technical
6.1.1 Constant-tensile-load test apparatus which maintains
Barriers to Trade (TBT) Committee.
the load to within 61 % throughout the test duration.
6.1.2 Immersion vessels which can be mounted to the
2. Referenced Documents
tensile-load apparatus (if applicable).
2.1 ASTM Standards:
D638 Test Method for Tensile Properties of Plastics
7. Test Specimen
7.1 Test bars may be either fabricated from compression
3. Summary of Test Method
molded plaques, injection molded, or cut from finished prod-
3.1 The procedure uses tensile specimen test bars in a
uct. Test times and/or stress levels may be reduced by
longitudinal tensile test geometry in a constant load (creep)
incorporating a knit-line into an injection-molded test bar. If a
method. All procedures are run at an ambient temperature of
knit-line is present, the mold should be designed such that the
73 °F (23 °C).
knit-line occurs in the center of the bar, perpendicular to the
longitudinal axis.
7.2 A Type IV specimen as shown in Test Method D638
This test method is under the jurisdiction of ASTM Committee F17 on Plastic
Piping Systems and is the direct responsibility of Subcommittee F17.40 on Test shallbeusedforrefereetesting.Otherspecimengeometriesare
Methods.
acceptable if shown to provide equivalent results.
Current edition approved May 1, 2021. Published May 2021. Originally
approved in 2004. Last previous edition approved in 2016 as F2331–11(2016). DOI:
8. Calibration and Standardization
10.1520/F2331-11R21.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.1 All test instrumentation shall be calibrated to standards
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
traceable to a national standards agency such as the National
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. Institute of Standards and Technology in the United States.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F2331 − 11 (2021)
9. Conditioning 11. Calculation or Interpretation of Results
11.1 When using this method with a single stress level, the
9.1 Condition the specimens and the test chemical or
applied stress or strain should be sufficient to cause failures
material for 40 h at 73 °F 6 4 °F (23 °C 6 2 °C) and 50 % 6
with known stress-cracking agents within 100 h. As such, it is
10 % RH prior to applying the test chemical or material to the
generally considered acceptable if the chemical or material
specimen.
under test does not cause a failure within 1000 h at that same
stress level.
10. Procedure
11.2 When using this method with
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